How do you replace an egr valve in a 2002 Astro AWD?

1.Detach the cable from the negative terminal of the battery. 2.Remove the engine cover and the air cleaner and housing assembly. 3.Detach the the vaccum line from the egr valve vaccum tube. 4.Trace the temperature switch pigtail lead to the main engine wire harness and unplug the electrical connector, then remove the switch from the valve. 5.Remove egr mounting bolts (2). 6.Remove egr valve and gasket from the manifold. Clean mounting surface with wire wheel or wire brush. 7. Installation is reverse of removal.